I got this at the junk yards while back and I told the guy I needed a 5.9 alternator. He came from the back with this one and I couldn't find any specs online but I'm using my phone so maybe someone on here can help me out. Here is a pic of the sticker with the numbers on it. Thanks for the help!

Thanks man! I should have known they didn't have one. I have one more question. I got a almost new alternator from the jy and it has a bigger pulley on it. I looked at the one on my zj and it had a smaller pulley on it. They are both 7 grooves but the diameters are different the one I have on is smaller and the junk yard alternator. Would the alternator with the smaller diameter spin faster?